package com.plm.mr.etl;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;

import java.io.IOException;

/**
 * ETL清洗
 */
public class WebLogDriver {
    public static void main(String[] args) throws IOException, InterruptedException, ClassNotFoundException {
        // 输入输出路径需要根据自己电脑上实际的输入输出路径设置
        args = new String[]{"E:\\projects\\hadoop\\fs-input\\inputlog", "E:\\projects\\hadoop\\fs-output\\output5"};

        // 1获取 job 信息
        Configuration conf = new Configuration();
        Job job = Job.getInstance(conf);

        // 2加载 jar 包
        job.setJarByClass(WebLogDriver.class);

        // 3关联 map
        job.setMapperClass(WebLogMapper.class);

        // 4设置最终输出类型
        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(NullWritable.class);

        // 设置 reducetask 个数为 0
        job.setNumReduceTasks(0);

        // 5设置输入和输出路径
        FileInputFormat.setInputPaths(job, new Path(args[0]));
        FileOutputFormat.setOutputPath(job, new Path(args[1]));

        // 6提交
        boolean b = job.waitForCompletion(true);
        System.exit(b ? 0 : 1);
    }
}
